7 most beautiful images of Universe captured by NASA

The star cluster Pismis 24 lies within the much larger emission nebula called NGC 6357, located about 8000 light-years from Earth.

Andromeda Galaxy, also known as Messier 31 (M31), is a spiral galaxy located about 2.5 million light years away.

RCW 120 is an emission nebula and H II region in the Milky Way galaxy. It's located in the constellation Scorpius, about 4,300 light-years from Earth. 

Westerlund 1 is a compact young super star cluster about 3.8 kpc away from Earth. It is located 13,800 light-years away.

The Keyhole Nebula is a dark cloud of dust and gas within the Carina Nebula. It's named for its keyhole-like shape. The Keyhole Nebula is located in the Milky Way, about 8,000 light-years from Earth. 

The Godzilla Nebula is a cloud of gas and dust in the constellation Sagittarius that resembles the movie monster Godzilla. The image was captured by NASA's Spitzer Space Telescope. 

AG Carinae is a rare, massive, blue star in the Milky Way galaxy that's surrounded by a nebula of gas and dust. It's one of the brightest stars in the galaxy. 

Credit: NASA